Active Dead-time optimization for wide range Flyback active-clamp converter

Sebastien Larousse,Hubert Razik,Remy Cellier,Nacer Abouchi, Philippe Volay

PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management（2016）

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摘要

The Flyback Active-clamp topology can work on a wide input voltage range. But the parasitic capacitor of the main MOSFET used in the soft switching is affected by the input voltage variation and then reduces the efficiency of the converter. In this article, the strategy used to maintain an optimal valley switching by adapting PWM dead-times is described. We have tested our strategy on a 20 V to 120 V input / 30 W converter operating at 200 kHz We

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